Toxoid is defined as?

Toxoid is defined as?

• A. A toxin of a pathogenic organism treated to destroy its toxicity but leave it capable of inducing antibodies on injection
• B. A toxin that is more potent
• C. A toxin that is completely neutralized
• D. A live attenuated organism used in vaccines

Answer: (A)

A toxoid is a toxin from a pathogenic organism that has been inactivated so it can no longer cause disease, but its antigenic structure is preserved enough to stimulate the immune system to make neutralizing antibodies. When the toxoid is injected, it teaches the body to recognize the toxin and mount an antibody response, so if the real toxin is encountered later, those antibodies can neutralize it. This is how vaccines against diphtheria and tetanus work. It’s not about making a toxin more potent, and it’s not simply a completely neutralized toxin that wouldn’t provoke immunity, and it’s not a live organism used in vaccines.

A toxoid is a toxin from a pathogenic organism that has been inactivated so it can no longer cause disease, but its antigenic structure is preserved enough to stimulate the immune system to make neutralizing antibodies. When the toxoid is injected, it teaches the body to recognize the toxin and mount an antibody response, so if the real toxin is encountered later, those antibodies can neutralize it. This is how vaccines against diphtheria and tetanus work. It’s not about making a toxin more potent, and it’s not simply a completely neutralized toxin that wouldn’t provoke immunity, and it’s not a live organism used in vaccines.